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Finding the Fourth Proportional to 485,595.87, 670,171.29 and 281,709.15

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Solution

The fourth proportional to 485,595.87, 670,171.29 and 281,709.15 is: 388,787.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,595.87 : 670,171.29 = 281,709.15 : x
  2. Step 2: Convert to fraction form
    485,595.87/670,171.29 = 281,709.15/x
  3. Step 3: Cross multiply
    485,595.87x = 670,171.29 × 281,709.15
  4. Step 4: Simplify right side
    485,595.87x = 188,793,384,460.30
  5. Step 5: Solve for x
    x = 188,793,384,460.30/485,595.87
  6. Step 6: Final answer
    x = 388,787.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.